IGBT chopper driver circuit consists of a PWM waveform generator, and a hybrid driver circuit, with de-saturation detection. The pulse-input circuit is optically isolated from the driver circuit, The output circuit from this driver protects the IGBT module from dangerous transient voltages. The de-saturation trip time can be adjusted by a suitable capacitor in the driver stage.

NOTE: It is important to note that, dangerous voltage will exist when IGBTs are connected to this circuit. So all the precautions must be taken to avoid any fatalities while conducting the experiment.

Specifications:

• Pulse input : There is a built in PWM generator.
  
• PWM : Repetition rate is adjustable in the range of 100Hz to 1KHz and TTL
  
• Duty cycle : Duty cycle is adjustable in the range of 10% to 90%
  
• Opto-Isolator : 30kV/uSec.
  
• Electrical Isolation : Viso = 2500Vrms for one minute.
  
• Recommend for use with: Vces of 600V
  
• Facility to connect an external PWM also as input to the driver circuit
  
• Input to the driver : internally generated PWM or external PWM can be given as input to this driver and it is optically isolated.